Rocket stove in use - everyone needs to know how to build/use one of these for "those" times when there's no other way to cook. (My Junior Girl Scout Handbook showed this stove made with a large coffee can.
A rocket stove burns so efficiently that it ensures almost complete combustion prior to the flames reaching the cooking surface, so there is virtually no smoke. And they're easy to make! Click through (Diy Step Fitness)